Is Quaker State Oil the same as Pennzoil?

• Two prominent choices in the market, Pennzoil and Quaker State, both come from the same brand, Shell. However, they offer distinct formulations tailored to different engine types and requirements. Pennzoil utilizes natural gas as its primary base oil source, contributing to engine cleanliness and longevity.

https://mroilguy.com/pennzoil-vs-quaker-state/
They may be owned by Shell company but they are not the same product. Like many large companies, they merge for back-office savings and other tax-related items.